The sensing device is a MEMS microphone that outputs a pulse density modulated (PDM) signal. There are chips available to directly interface such a microphone to a USB port, but [Mahesh] found ...

Deciding to go for a full digital design for the circuitry, the peripheral is based off of a MEMS microphone and an STM32 microcontroller doing the heavy lifting between it and a USB connection.

X-FAB to Provide Foundry Services for Akustica's Family of CMOS MEMS Silicon Microphone Chips ERFURT, GERMANY and PITTSBURGH, PA -- May 31, 2006 -- Akustica, Inc., a pioneer in acoustic system-on-chip ...

Microphone chips are integrated circuits (IC) microphones and are usually mounted directly to a circuit board. A pressure-sensitive diaphragm is etched directly into a silicon chip by Micro-Electrical ...

One such emerging commercial application is Vesper’s piezoelectric MEMS microphone, which is awakened by sound waves from the voice converted to an electrical signal. CEO Matt Crowley noted that other ...